step(ci,(r,s),tm(s,[ctxm(beta_2_,ci,ip, (ip,ci), (ip,ci)),ctxm(beta_2_,r,ip, (ip,r), (ip,r))],pri(lst,[pri(h,[pri(lst,[pri(h,[ctxm(beta_2_,u,bsn,i_bsn,i_bsn)]),ctxm(beta_2_,r,dom, (dom,r,beta_2_), (dom,r,beta_2_))])]),ctxm(beta_2_,u,d_2, (i,d_2), (c,d_2)),ctxm(beta_2_,u,d_5, (i,d_5), (c,d_5))]))).
